import auth from '@/plugins/auth'
import router, { constantRoutes, dynamicRoutes } from '@/router'
import { getRouters } from '@/api/menu'
import Layout from '@/layout/index'
import ParentView from '@/components/ParentView'
import InnerLink from '@/layout/components/InnerLink'

const permission = {
  state: {
    routes: [],
    addRoutes: [],
    defaultRoutes: [],
    topbarRouters: [],
    sidebarRouters: []
  },
  mutations: {
    SET_ROUTES: (state, routes) => {
      state.addRoutes = routes
      state.routes = constantRoutes.concat(routes)
    },
    SET_DEFAULT_ROUTES: (state, routes) => {
      state.defaultRoutes = constantRoutes.concat(routes)
    },
    SET_TOPBAR_ROUTES: (state, routes) => {
      state.topbarRouters = routes
    },
    SET_SIDEBAR_ROUTERS: (state, routes) => {
      state.sidebarRouters = routes
    },
  },
  actions: {
    // 生成路由
    // 修改GenerateRoutes方法
    GenerateRoutes({ commit }) {
      return new Promise(resolve => {
        getRouters().then(res => {
          const sdata = JSON.parse(JSON.stringify(res.data))
          const rdata = JSON.parse(JSON.stringify(res.data))

          // 只保留你需要的一级菜单
          const allowedPaths = ['/user-data', '/post', '/analysis', '/notice']
          const filteredData = sdata.filter(route =>
            allowedPaths.includes(route.path) ||
            constantRoutes.some(cr => cr.path === route.path)
          )
          const sidebarRoutes = filterAsyncRouter(filteredData)
          const rewriteRoutes = filterAsyncRouter(rdata, false, true)

          // 只添加你需要的动态路由
          const neededDynamicRoutes = dynamicRoutes.filter(route =>
            route.path.includes('/user-data') // 只保留用户数据相关动态路由
          )

          router.addRoutes(neededDynamicRoutes)
          commit('SET_ROUTES', rewriteRoutes)
          commit('SET_SIDEBAR_ROUTERS', constantRoutes.concat(sidebarRoutes))
          commit('SET_DEFAULT_ROUTES', sidebarRoutes)
          commit('SET_TOPBAR_ROUTES', sidebarRoutes)
          resolve(rewriteRoutes)
        }).catch(error => {
          // 确保即使接口失败也能访问基础页面
          commit('SET_ROUTES', constantRoutes)
          commit('SET_SIDEBAR_ROUTERS', constantRoutes)
          resolve(constantRoutes)
        });
      });
    }
  }
}

// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap, lastRouter = false, type = false) {
  return asyncRouterMap.filter(route => {
    if (type && route.children) {
      route.children = filterChildren(route.children)
    }
    if (route.component) {
      // Layout ParentView 组件特殊处理
      if (route.component === 'Layout') {
        route.component = Layout
      } else if (route.component === 'ParentView') {
        route.component = ParentView
      } else if (route.component === 'InnerLink') {
        route.component = InnerLink
      } else {
        route.component = loadView(route.component)
      }
    }
    if (route.children != null && route.children && route.children.length) {
      route.children = filterAsyncRouter(route.children, route, type)
    } else {
      delete route['children']
      delete route['redirect']
    }
    return true
  })
}

function filterChildren(childrenMap, lastRouter = false) {
  var children = []
  childrenMap.forEach(el => {
    el.path = lastRouter ? lastRouter.path + '/' + el.path : el.path
    if (el.children && el.children.length && el.component === 'ParentView') {
      children = children.concat(filterChildren(el.children, el))
    } else {
      children.push(el)
    }
  })
  return children
}

// 动态路由遍历，验证是否具备权限
export function filterDynamicRoutes(routes) {
  const res = []
    routes.forEach(route => {
      // 只处理用户数据相关的动态路由
      if (route.path.includes('/user-data')) {
        if (route.permissions) {
          if (auth.hasPermiOr(route.permissions)) {
            res.push(route)
          }
        } else if (route.roles) {
          if (auth.hasRoleOr(route.roles)) {
            res.push(route)
          }
        }
      }
    })
    return res
}

export const loadView = (view) => {
  if (process.env.NODE_ENV === 'development') {
    return (resolve) => require([`@/views/${view}`], resolve)
  } else {
    // 使用 import 实现生产环境的路由懒加载
    return () => import(`@/views/${view}`)
  }
}

export default permission
